Borrower promises to make a single, final payment for the entire balance owed to the Payee on or before. Here's the information you'll need to have handy to complete your secured promissory note, installment with balloon final payment.A balloon payment is due at the end equal to the purchase price to acquire ownership of the property. Set loan terms with larger payments at the end. Use this unsecured promissory note (installment with balloon final payment) to make your loan official. Create and download a promissory note for free! Create a secured note using the Pennsylvania Secured Promissory Note Template (download links on this page). The Installment Promissory Note with Final Balloon Payment requires equal monthly payments (which include Principal and interest) with a final balloon payment.